83819965 has 4 divisors (see below), whose sum is σ = 100583964. Its totient is φ = 67055968.

The previous prime is 83819951. The next prime is 83819969. The reversal of 83819965 is 56991838.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18096516 + 65723449 = 4254^2 + 8107^2 .

It is a cyclic number.

It is not a de Polignac number, because 83819965 - 2⁹ = 83819453 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83819969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8381992 + ... + 8382001.

It is an arithmetic number, because the mean of its divisors is an integer number (25145991).

Almost surely, 2^83819965 is an apocalyptic number.

It is an amenable number.

83819965 is a deficient number, since it is larger than the sum of its proper divisors (16763999).

83819965 is a wasteful number, since it uses less digits than its factorization.

83819965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16763998.

The product of its digits is 466560, while the sum is 49.

The square root of 83819965 is about 9155.3244071415. The cubic root of 83819965 is about 437.6388065681.

The spelling of 83819965 in words is "eighty-three million, eight hundred nineteen thousand, nine hundred sixty-five".